and merged with some trunk svc like iirc:
551 - Ppl along Hougang Ave 8 can take 147 to city although it
never go to Orchard or MRT at Hougang MRT iirc
576 - ppl can take 518...
577 - ppl can take service 143??
The rest i not sure.. cheers!!
147 also takes hours just to reach city.